There was mention of an infection that could cause an abnormal reading but I’m guessing this is quite unlikely.
Actually, it's pretty common. One way to sorta-kinda tell the difference is that PSA from prostate infections or chronic prostate inflammation will jump around -- go up one test and down the next. Prostate cancer shows as a steady PSA rise, often not very fast and not necessarily higher than you see with an infection.
You need to keep an eye on your PSA because of your family history but some sort of prostatitis could easily explain your PSA history.
One other observation: Erectile dysfunction is not usually a symptom of prostate cancer -- its just something that happens to men around the same age as prostate cancer become more prevalent. If your ED is bothering you you can talk to your urologist about
it as a separate issue. The drugs in the helpful pills are going generic one-by-one and the prices are coming way down, especially for sildenafil (the drug in Viagra). Sometimes insurance doesn't like to cover ED drugs but if you shop around they aren't that expensive to pay for yourself if you need to.
A final observation: While ED isn't a common effect of prostate cancer it is
a common side-effect of prostate cancer treatments. In the not-at-all-certain event that you are
diagnosed you don't want to rush willy-nilly into signing up for the first treatment you hear about
. There are a number of options that will work equally well in terms of disease control but they can differ wildly in terms of side effect probabilities.